diff --git a/requirements.txt b/requirements.txt
index e383e0c..e7fd8e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ parso==0.4.0
 pexpect==4.7.0
 pickleshare==0.7.5
 prompt-toolkit==2.0.9
-protobuf==3.7.1
+protobuf==3.15.0
 ptyprocess==0.6.0
 pyglet==1.3.2
 Pygments==2.4.1